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Only 'push' and 'pop' come from the stack terminology. You 'pop' plates off the top (the rest of the plates 'pop' up when you do it I guess).

I would say 'shift' comes from shell scripting, where you 'shift' the arguments off of the list passed to the script. This is a fairly natural usage, and might also derive from assembly language, where a basic operation is to shift all the bits in a register one place left or right.

'unshift' is probably originates with perl and would have been named by analogy with 'shift' I think.


In reply to Re: Why are "push", "pop", "shift" and "unshift" so named? by jbert
in thread Why are "push", "pop", "shift" and "unshift" so named? by Cody Pendant

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